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07-07-2020, 05:06 PM
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#1
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Senior Member
Excel Owners Club
Join Date: Aug 2008
Location: St Louis
Posts: 243
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Please be kind.lol
I know there are so may variables that make this question impossible to pin point. and Ive read several ads claiming unbelievable boasts. but here it goes.... I am pretty sure I will be purchaseing a '99 37' allegro bus with a 330 hp CAT engine and a 6 speed Alison tranny. ....Bare bone empty what kinda fuel milage might I be able to get? .. I am really sorry to even put this question out there.
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SteveNJan
2000 Country Coach Intrigue # 11019
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07-07-2020, 05:23 PM
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#2
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Senior Member
Join Date: Dec 2011
Location: Corinth, MS
Posts: 485
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I have a 2005 Gulfstream 36' cat 350 C7 7.5 mpg & almost always towing enclosed trailer, I do believe you'll have an older version of the C7, 3206? Or something like that, the numbers escape me right now, oh, I do love the Mp8 tho
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Mike & Becky
2005 Holiday Rambler Navigator 45PBQ
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07-07-2020, 05:36 PM
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#3
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Registered User
Newmar Owners Club Ford Super Duty Owner Freightliner Owners Club Retired Fire Service RVer's
Join Date: Jan 2019
Location: Rosemary Farm, Northern Ca
Posts: 5,444
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Quote:
Originally Posted by Frutza
I have a 2005 Gulfstream 36' cat 350 C7 7.5 mpg & almost always towing enclosed trailer, I do believe you'll have an older version of the C7, 3206? Or something like that, the numbers escape me right now, oh, I do love the Mp8 tho
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This MP8?
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07-07-2020, 05:37 PM
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#4
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Registered User
Newmar Owners Club Ford Super Duty Owner Freightliner Owners Club Retired Fire Service RVer's
Join Date: Jan 2019
Location: Rosemary Farm, Northern Ca
Posts: 5,444
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Quote:
Originally Posted by Steve,N,Jan
I know there are so may variables that make this question impossible to pin point. and Ive read several ads claiming unbelievable boasts. but here it goes.... I am pretty sure I will be purchaseing a '99 37' allegro bus with a 330 hp CAT engine and a 6 speed Alison tranny. ....Bare bone empty what kinda fuel milage might I be able to get? .. I am really sorry to even put this question out there.
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I would expect 7-8 unloaded or with a light load.
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07-07-2020, 06:20 PM
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#5
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Senior Member
Excel Owners Club
Join Date: Aug 2008
Location: St Louis
Posts: 243
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Thanks thats what I was figuring. these people putting 14 mpg stuff is crazy. I drive a concrete truck for a living and working all day we get 2.5 to 3.5 I hoped not working with THAT big of loads it would get more but wondered about how much
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SteveNJan
2000 Country Coach Intrigue # 11019
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07-07-2020, 06:31 PM
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#6
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Senior Member
Join Date: Apr 2011
Location: Powell River, B.C.
Posts: 31,486
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When you get a chance , to look at the engine valve cover I believe you'll find a decal giving your engine type and power rating .
This should confirm that you have a 3126B Cat engine . the 330 HP version .
These two files should help you understand the fuel system and engine . 
Also info from Cat , on getting the best fuel economy out of your RV.
Safe travels.
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99DSDP 3884, Freightliner, XC, CAT 3126B, 300 HP /ALLISON 3060
2000 Caravan toad, Remco & Blue Ox.
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07-07-2020, 07:20 PM
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#7
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Community Moderator
Newmar Owners Club
Join Date: Feb 2011
Location: Point Pleasant Beach, NJ
Posts: 31,553
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This has been an oft ad,Ed question. It seem the average mpg comes in between 6.5 and 8. There are a few exceptions but not many.
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Tony & Ruth........... FMCA#F416727
2016 London Aire 4519, Freightliner chassis, Cummins ISX, 2018 Jeep Wrangler Unlimited, Blue Ox Avail with AF1. TST 507 TPMS
No amount of money can buy you an extra second of time.
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07-07-2020, 08:04 PM
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#8
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Director of Partnerships
Official iRV2 Sponsor
Join Date: Nov 2014
Location: Ft.Worth, TX.
Posts: 841
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8 mpg
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2015 Tiffin Phaeton 42LH - All Electric w/tag & RettroBands
2016 Jeep Wrangler Unlimited Sport w/mods
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07-07-2020, 08:20 PM
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#9
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Senior Member
Join Date: Sep 2010
Location: Bossier City,Louisiana
Posts: 658
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My best guess is your engine is 3126B 275 or 300 horse not a 330 horse and it will get between 7 and 10 mpg depending on the load, road conditions ,and how fast you drive.Ive had two of those cats and they are good engines .
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07-08-2020, 03:52 AM
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#10
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Senior Member
Excel Owners Club
Join Date: Aug 2008
Location: St Louis
Posts: 243
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Tanks everyone Ill get a pic of valve cover saturday
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SteveNJan
2000 Country Coach Intrigue # 11019
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07-08-2020, 09:46 AM
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#11
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Member
Join Date: Dec 2013
Location: The Dalles, OR
Posts: 89
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2002 Allegro Bus with Cat 3126 330 hp. Right at 8 mpg on average.
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